Taco Bell isn't putting down the chalupa just yet, but it's embarking on a push to shake its reputation as a purveyor of junk food.

The fast-food chain announced Wednesday that it's exploring ways to offer more balanced choices and transparency. That could mean new products and reformulations of existing offerings.

The move is likely to be met with skepticism in some corners, considering that Taco Bell is known for urging people to eat nachos as a "fourth meal" late at night. But it shows just how much pressure the industry is under to recast its greasy-food image as people increasingly seek out options they feel are healthier.

Taco Bell is a unit of Yum Brands Inc., which also owns KFC and Pizza Hut.

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